For example, a card with high cost and destructive potential can be balanced by cards that reduce its cost or speed up its play
Not a one of them could attack for 4 damage in the air
Chart shows the price of Madam Mim - Up to No Good [Foil] #59 at the end of each month going back as long as we have tracked the item.
If you cast Display of Power, you can, at most, make one copy of each instant and sorcery spell on the stack
Take a new foil method, give it to one of Magics most popular characters, and put it on one of her better cards, and the result is a piece worth over $200
More recently, there was also Vexilus PraetorVexilus Praetor to protect your commander or let them alpha strike through, and The Stasis CoffinThe Stasis Coffin to hold your temporary immortality over the whole table